1 /* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /*
3    Copyright (C) 2009-2015 Red Hat, Inc.
4 
5    This library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Lesser General Public
7    License as published by the Free Software Foundation; either
8    version 2.1 of the License, or (at your option) any later version.
9 
10    This library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14 
15    You should have received a copy of the GNU Lesser General Public
16    License along with this library; if not, see <http://www.gnu.org/licenses/>.
17 */
18 
19 #ifndef IMAGE_CACHE_H_
20 #define IMAGE_CACHE_H_
21 
22 #include <inttypes.h>
23 #include <common/pixman_utils.h>
24 #include <common/canvas_base.h>
25 #include <common/ring.h>
26 
27 SPICE_BEGIN_DECLS
28 
29 /* FIXME: move back to display-channel.h (once structs are private) */
30 typedef struct Drawable Drawable;
31 
32 typedef struct ImageCacheItem {
33     RingItem lru_link;
34     uint64_t id;
35 #ifdef IMAGE_CACHE_AGE
36     uint32_t age;
37 #endif
38     struct ImageCacheItem *next;
39     pixman_image_t *image;
40 } ImageCacheItem;
41 
42 #define IMAGE_CACHE_HASH_SIZE 1024
43 
44 typedef struct ImageCache {
45     SpiceImageCache base;
46     ImageCacheItem *hash_table[IMAGE_CACHE_HASH_SIZE];
47     Ring lru;
48 #ifdef IMAGE_CACHE_AGE
49     uint32_t age;
50 #else
51     uint32_t num_items;
52 #endif
53 } ImageCache;
54 
55 void         image_cache_init              (ImageCache *cache);
56 void         image_cache_reset             (ImageCache *cache);
57 void         image_cache_aging             (ImageCache *cache);
58 void         image_cache_localize          (ImageCache *cache, SpiceImage **image_ptr,
59                                             SpiceImage *image_store, Drawable *drawable);
60 void         image_cache_localize_brush    (ImageCache *cache, SpiceBrush *brush,
61                                             SpiceImage *image_store);
62 void         image_cache_localize_mask     (ImageCache *cache, SpiceQMask *mask,
63                                             SpiceImage *image_store);
64 
65 SPICE_END_DECLS
66 
67 #endif /* IMAGE_CACHE_H_ */
68